[Br:1][C:2]1[N:7]=[C:6]([C:8]([CH3:12])([CH3:11])[C:9]#[N:10])[CH:5]=[CH:4][CH:3]=1.OO.C(=O)([O-])[O-:16].[K+].[K+]>CS(C)=O>[Br:1][C:2]1[N:7]=[C:6]([C:8]([CH3:12])([CH3:11])[C:9]([NH2:10])=[O:16])[CH:5]=[CH:4][CH:3]=1To a solution of 2-(6-bromopyridin-2-yl)-2-methylpropanenitrile (Example 367, Step 1) (200 mg, 0.89 mmol) in dimethylsulfoxide (4 mL) was added hydrogen peroxide (0.42 mL, 4.8 mmol) and potassium carbonate (1.23 g, 8.89 mmol). The reaction was then stirred overnight at 70° C. The resulting slurry was cooled to ambient temperature, filtered and directly purified by reverse phase HPLC (10-100% acteonitrile/water+0.05% TFA modifier) to yield the title compound.
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